Effil

Sorry about that, I did a quick search which yielded no results. I thought this was too random to be a common error, but I found the other posts this time. Thanks for explaining though, I'll try the steps you recommended.

I always make my lecture notes with a heading, followed by a bulleted list underneath listing key points related to the topic. I have made over 60 notes without problem, but now all of the sudden on almost every single note, there will be a section or 2 that used to be a checkbox containing info, now replaced with an empty checkbox and nothing else. This is incredibly frustrating, after I fix them they seem to stay fixed, but why is this happening?